/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package a.gui.proguard.gui;

import javax.swing.*;

import a.retrace.proguard.retrace.ReTrace;

import java.awt.*;
import java.io.*;

/**
 * This <code>Runnable</code> runs ReTrace, sending the output to a text area and any exceptions to message dialogs.
 *
 * @see ReTrace
 * @author Eric Lafortune
 */
final class ReTraceRunnable implements Runnable {
    private final JTextArea consoleTextArea;
    private final boolean verbose;
    private final File mappingFile;
    private final String stackTrace;

    /**
     * Creates a new ReTraceRunnable.
     * 
     * @param consoleTextArea the text area to send the console output to.
     * @param verbose specifies whether the de-obfuscated stack trace should be verbose.
     * @param mappingFile the mapping file that was written out by ProGuard.
     */
    public ReTraceRunnable(JTextArea consoleTextArea, boolean verbose, File mappingFile, String stackTrace) {
        this.consoleTextArea = consoleTextArea;
        this.verbose = verbose;
        this.mappingFile = mappingFile;
        this.stackTrace = stackTrace;
    }

    // Implementation for Runnable.

    public void run() {
        consoleTextArea.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
        consoleTextArea.setText("");

        LineNumberReader reader = new LineNumberReader(new CharArrayReader(stackTrace.toCharArray()));

        PrintWriter writer = new PrintWriter(new TextAreaWriter(consoleTextArea), true);

        try {
            // Execute ReTrace with the collected settings.
            new ReTrace(ReTrace.STACK_TRACE_EXPRESSION, verbose, mappingFile).retrace(reader, writer);
        } catch (Exception ex) {
            // Print out the exception message.
            System.out.println(ex.getMessage());

            // Show a dialog as well.
            MessageDialogRunnable.showMessageDialog(consoleTextArea, ex.getMessage(), msg("errorReTracing"),
                JOptionPane.ERROR_MESSAGE);
        } catch (OutOfMemoryError er) {
            // Forget about the ProGuard object as quickly as possible.
            System.gc();

            // Print out a message suggesting what to do next.
            System.out.println(msg("outOfMemory"));

            // Show a dialog as well.
            MessageDialogRunnable.showMessageDialog(consoleTextArea, msg("outOfMemory"), msg("errorReTracing"),
                JOptionPane.ERROR_MESSAGE);
        }

        consoleTextArea.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
        consoleTextArea.setCaretPosition(0);
    }

    // Small utility methods.

    /**
     * Returns the message from the GUI resources that corresponds to the given key.
     */
    private String msg(String messageKey) {
        return GUIResources.getMessage(messageKey);
    }
}
